Exploring the Core-galaxy Connection
Halo core tracking is a novel concept designed to efficiently follow halo substructure in large simulations. We have recently developed this concept in gravity-only simulations to investigate the galaxy-halo connection in the context of empirical and semi-analytic models. Here, we incorporate infor...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Maynooth Academic Publishing
2025-06-01
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| Series: | The Open Journal of Astrophysics |
| Online Access: | https://doi.org/10.33232/001c.141464 |
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| _version_ | 1849433971100745728 |
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| author | Isabele Lais de Souza Vitório Michael Buehlmann Eve Kovacs Patricia Larsen Nicholas Frontiere Katrin Heitmann |
| author_facet | Isabele Lais de Souza Vitório Michael Buehlmann Eve Kovacs Patricia Larsen Nicholas Frontiere Katrin Heitmann |
| author_sort | Isabele Lais de Souza Vitório |
| collection | DOAJ |
| description | Halo core tracking is a novel concept designed to efficiently follow halo substructure in large simulations. We have recently developed this concept in gravity-only simulations to investigate the galaxy-halo connection in the context of empirical and semi-analytic models. Here, we incorporate information from hydrodynamics simulations, with an emphasis on establishing a connection between cores and galaxies. We compare cores across gravity-only, adiabatic hydrodynamics, and subgrid hydrodynamics simulations with the same initial phases. We demonstrate that cores are stable entities whose halo-centric radial profiles match across the simulations. We further develop a methodology that uses merging and infall mass cuts to group cores in the hydrodynamics simulation, creating on average, a one-to-one match to corresponding galaxies. We apply this methodology to cores from the gravity-only simulation, thus creating a proxy for galaxies which approximate the populations from the hydrodynamics simulation. Our results pave the way to incorporate inputs from smaller-scale hydrodynamics simulations directly into large-scale gravity-only runs in a principled manner. |
| format | Article |
| id | doaj-art-2efbdd254b784ea9a42a341d9fa6a609 |
| institution | Kabale University |
| issn | 2565-6120 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Maynooth Academic Publishing |
| record_format | Article |
| series | The Open Journal of Astrophysics |
| spelling | doaj-art-2efbdd254b784ea9a42a341d9fa6a6092025-08-20T03:26:49ZengMaynooth Academic PublishingThe Open Journal of Astrophysics2565-61202025-06-01810.33232/001c.141464Exploring the Core-galaxy ConnectionIsabele Lais de Souza VitórioMichael BuehlmannEve KovacsPatricia LarsenNicholas FrontiereKatrin HeitmannHalo core tracking is a novel concept designed to efficiently follow halo substructure in large simulations. We have recently developed this concept in gravity-only simulations to investigate the galaxy-halo connection in the context of empirical and semi-analytic models. Here, we incorporate information from hydrodynamics simulations, with an emphasis on establishing a connection between cores and galaxies. We compare cores across gravity-only, adiabatic hydrodynamics, and subgrid hydrodynamics simulations with the same initial phases. We demonstrate that cores are stable entities whose halo-centric radial profiles match across the simulations. We further develop a methodology that uses merging and infall mass cuts to group cores in the hydrodynamics simulation, creating on average, a one-to-one match to corresponding galaxies. We apply this methodology to cores from the gravity-only simulation, thus creating a proxy for galaxies which approximate the populations from the hydrodynamics simulation. Our results pave the way to incorporate inputs from smaller-scale hydrodynamics simulations directly into large-scale gravity-only runs in a principled manner.https://doi.org/10.33232/001c.141464 |
| spellingShingle | Isabele Lais de Souza Vitório Michael Buehlmann Eve Kovacs Patricia Larsen Nicholas Frontiere Katrin Heitmann Exploring the Core-galaxy Connection The Open Journal of Astrophysics |
| title | Exploring the Core-galaxy Connection |
| title_full | Exploring the Core-galaxy Connection |
| title_fullStr | Exploring the Core-galaxy Connection |
| title_full_unstemmed | Exploring the Core-galaxy Connection |
| title_short | Exploring the Core-galaxy Connection |
| title_sort | exploring the core galaxy connection |
| url | https://doi.org/10.33232/001c.141464 |
| work_keys_str_mv | AT isabelelaisdesouzavitorio exploringthecoregalaxyconnection AT michaelbuehlmann exploringthecoregalaxyconnection AT evekovacs exploringthecoregalaxyconnection AT patricialarsen exploringthecoregalaxyconnection AT nicholasfrontiere exploringthecoregalaxyconnection AT katrinheitmann exploringthecoregalaxyconnection |